HM74HC14
HM74HCT244
HM74HCT245
HM74LS175
HM74LS193
HM74LS280
HM74LS38
HM7645JB0-P-016AAA-LF
HM772
HM772A
0755-83867989
0755-82571496
19129491934(手机优先微信同号)